The second species of roundworm, Toxascaris leonina, has a simpler lifecycle. It completes its cycle in the intestine and does not migrate within the body. The same wormers are effective against both species. Many of the combination worming treatments are effective against roundworms. Monthly flea or heartworm prevention programs that include roundworm treatments are also effective in preventing environmental contamination. Due to the fact that roundworms can only be treated when they are present in the intestine, multiple treatments may be required to rid the dog’s system of roundworms. The monthly preventative programs are effective in accomplishing this task.
Hookworms (Ancylostoma caninum, Ancylostoma braziliense)
Heavy burdens of most intestinal worms can cause serious illness in your dog and hookworm, in particular, can cause death in young pups due to blood loss. Unlike other intestinal worms that absorb nutrients from food passing through the digestive system, hookworms suck blood directly from their host. Like roundworms they have an environmental stage in their lifecycle and they can also migrate in the body, infecting the lungs and mammary glands as well as unborn puppies.
Hookworm eggs are passed into the environment through the droppings of infected dogs. The eggs hatch in the soil and complete two further stages of their lifecycle before being able to infect another host. They do this in two ways- either by being licked up by a dog whose coat has been contaminated with soil carrying larvae, or by